Resilient support for typewriting machines



Sept. 9, 1952 DODGE 2,610,010

RESILIENT SUPPORT FOR TYPEWRITING MACHINES Filed June 20, 1947 FIGJ.

\ "'1 l W 15 1 6,10 M W I 15 I! 110 .18 v v I .F I iwxz 'g zowf BY W ATTORNEY Patented Sept. 9, 1952 RESILIENT SUPPORT FOR TYPEWRITING MACHINES Ronald D. Dodge, Poughkeepsie, N. Y., assignor to International Business Machines Corporation, New York, N. Y., a corporation of New York Application June 20, 1947, Serial N0. 755,999

3 Claims. 1

a desk.

An object is to provide a mounting for typewriters and other ofiice machines which reduces to a minimum the transmission of vibration from the machine to the desk.

An object is to provide a means for mounting a typewriter or other ofiice machine in a desk which permits the machine to be very quickly removed from the desk without the use of tools for the purpose of substituting another machine or for servicing the machine.

An object is to provide a mounting means which prevents the bucking of the machine which is usually found to take place when the carriage is returned, in cases where the machine is mounted on rubber feet to reduce noise and vibration, particularly with power operated typewriters where the carriage return operation takes place at great speed.

An object is to provide a mounting means which may be used as a template for screwing the typewriter to the desk.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the bestmode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a side elevation partly in section showing the mounting means and a typewriter supported thereby on a flat surface, such as the shelf of a typewriter desk.

Fig. 2 is a plan view of the mounting means with the typewriter removed and certain parts of the typewriter shown in section.

The mounting means includes a plate III which may be substantially square and formed with forked bent-over lugs Illa which partially surround the cylindrical walls of the vibration mounts II which are attached to the base of the typewriter I2 by means of the studs I3. The mounts I I may comprise an outer cylindrical flanged shell of metal and the flange is designed to slip under the lugs Illa to prevent the typewriter from being lifted off the plate I but permitting the typewriter to be slid forwardly or to the right in Fig. l and then raised. The plate I0 will be mounted on the machine shelf in such a fashion that the right hand edge of the plate (Fig. 2) is nearest the operator of the machine, with the lugs Illa facing to the right whereby, when the desk is closed and the shelf tilts downwardly and backwardly, the machine will tend to slide to the left against the yokes formed by lugs I 0a, which will firmly cradle the machine at four points and the flanges Ila of the mounts III, in coaction with lugs I (la, will prevent the machine from tipping backwardly into the well of the typewriter desk.

Conveniently the plate III may be secured to the shelf of the desk by screws I4 through holes which are in alignment with the studs I3 and the mounts II may be hollowed sufficiently to accommodate the screws as shown in Fig. 1. The mounts I I may be of a well known type in which the stud I3 is molded into a rubber plug which is bonded to the metal shell of which the flanges I la are a part, whereby the rubber is maintained in shear to most efiiciently damp vibration.

All typewriters are usually provided with four threaded holes in the base of the machine into which are usually screwed some form of rubber foot which is supposed to prevent the machine from sliding and also reduce the transmission of vibration to the desk. It will be understood that for each type of typewriter the plate III will be appropriately shaped and have the lugs Illa properly located so that when vibration mounts of the type shown in the drawings are used the mounts will properly seat between the lugs Illa.

When a typewriter is resiliently supported in this fashion on a desk, there is a, tendency for the machine to buck, due to the flexibility of the mount. In other words, as one faces the keyboard of the machine, when the carriage is returned, the machine tends to dip to the right and vibrate about a fore and aft axis. In order to prevent this action from occurring, the mounting plate I0 is provided with a checking device which consists of the crank shaft I5 having the cranks I5a formed at each end thereof. crank shaft I5 is journalled in brackets I6 which may be attached to the plate I 0 by suitable screws or rivets. If desired, the shaft I 5 may be mounted in the brackets I6 by means of pressed on rubber bushings or by bonding the rubber bushings both to the shaft and to the brackets I6.

Cranks I511 are preferably provided with short sections of rubber tubing I! pressed on the crank pin and the base of the machine has attached to it two plates I8, one at each side of the machine, which are formed with open horizontal slots or hooks receiving the pins of the cranks I5a.- With this arrangement the typewriter I2 The 3. can only vibrate vertically when the carriage is returned since any tendency of the machine to rotate on a horizontal fore and aft axis will cause one end or the other of the shaft I to be raised and depressed, as the case may be, and communicate a corresponding movement. to the other sideof the typewriter.

When the typewriter is removed from the mounting means I!) in the manner described above, the open slots in the plates [8 permit the machine to be disengaged from the crank shaft l5 and, if the crank shaft is mounted in the brackets I6 by bonded rubber, the crank shaft Will always remain in a position to properly register with the slots in plates i8 when the machine is restored.

While there have been shown and described and pointed out the fundamental novel features of the invention, as applied to a preferred embodiment, it will be understood that various omissions and substitutions and changes in the form- 'and' details; of the device illustrated and in its operation may be made by those skilled in'the art without departing from the spirit of the invention; It is the intention-therefore, to

be limited only as indicated by the scope of the following claims.

. What, is claimed is: V

-1. I n combination with means for resiliently mounting a typewriting machine on asurface such as a desk, a check shaft extending transversely of-the ;typewriting machine from one side to the other and having a pair of cranks adjacent said sides, and means adj acent'the sides ofsaid machine for connecting said machine to saidcranks, said shaft and cranks compelling saidmachine to vibrate vertically on said resilient mounting means.-

2a A'mounting device'for a typewriting machine having- :antiwibration feet of a-form including a shell provided with a flange, comprising an oblong one-piece "plate formed of sheet metal with a bent-over yoke-shaped lug for each antiv-ibrationf-oot, said lugs being arranged topartly 4 surround said feet and overlie said flanges to prevent lifting the machine from said plate but disengageable from said feet by sliding said machine clear of said lugs, said lugs cradling the machine' when said plate is tilted about an axis at right angles to the direction of disengagement and in a direction opposite the disengaging direction, and anti-buck means including a crank shaft journaled on said plate and having two cranks pivotally connected to the sides of said machine.

3. A mounting device for a typewriting machine having anti-vibration feet of a form including a shell provided with 'a flange, comprising an oblong one-piece plate formed of sheet metal with a bent-over yoke-shaped lug for each anti-vibration foot, said lugs being arranged to partly surround said feet and overlie said flanges to prevent lifting the machine from said plate but disengageable from said feet by sliding said machine clear of said lugs, said lugs cradling the machine when said plate is tilted aboutan axis at right angles to the direction of disengagement and in a direction opposite the disengaging direction, a: crank shaft journaled on said plate and having two cranks adjacent the sides of said machine, and plates mounted on the sides of the machine and having slots embracing the pins of the cranks so as to be disengageable from said cranks by said: sliding movement. 4

RONALD I). DODGE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

